¼’’ thick white polypropylene with a tempered glass front window. high chemical resistance to corrosive agents. internally mounted fluorescent light. Upon request, light can be externally mounted. overall dimensions (main chamber): 35” w x 24” d x 25” h; overall dimensions (airlock): 11.75” w x 10.5” d x 10.5” h two access doors open outwards (or inwards upon request) for negative pressure configuration. If an airlock is included, airlock doors open inwards. Doors include a stainless steel door frame, hinge, one-piece non-adhesive sealing. side door opening 10’’ x 10’’ blower module, adjustable speed, backward curved impeller 480-cfm, permanently lubricated, automatic reset thermal overload protection, 120vac, 60hz, ul listed; csa certified; enclosed in a polypropylene housing. primary hepa filter is 99.97% efficient at trapping particles as small as 0.3 microns. Filter media is ultra-fine glass fiber and is 3″ thick. The maximum temperature is 180° and the filter meets ul class 2 flame retardant requirements.